How do I install the Grep App skill?

Run npx skillmds@latest add archibate/grep-app in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Grep App safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Grep App?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Grep App free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Grep App?

archibate (@archibate) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Grep App by archibate — Agent Skill

Name: Grep App
Author: archibate

Grep App

Search real-world code examples from over a million public GitHub repositories via grep.app MCP. TRIGGER when need to find code usage patterns, see how developers use a library/API in practice, find production examples of a specific function or syntax, or search GitHub code at scale.

archibate f6ef523 3 files · 5.9 KB Updated Sep 17, 2026

File contents

grep.app

Search real-world code examples from over a million public GitHub repositories. Powered by grep.app MCP. No API key required.

searchGitHub

Find real-world code examples by searching for literal code patterns (like grep), not keywords.

query (required): literal code pattern (e.g. useState(, import React from, async function)
language: array of language filters (e.g. Python, TypeScript, TSX, Java, Go, Rust, C#, YAML, Markdown)
repo: filter by repository (e.g. facebook/react, vercel/) — partial names match
path: filter by file path (e.g. src/components/Button.tsx, /route.ts) — partial paths match
useRegexp: interpret query as regex (default: false). Prefix with (?s) for multiline
matchCase: case-sensitive search (default: false)
matchWholeWords: match whole words only (default: false)

Basic usage

${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"useState("
${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"getServerSession" --args '{"language": ["TypeScript", "TSX"]}'
${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"CORS(" matchCase:true --args '{"language": ["Python"]}'

Filter by repo or path

${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"createContext" repo:"facebook/react"
${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"export default" path:"/route.ts" --args '{"language": ["TypeScript"]}'

Regex patterns

${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"(?s)useEffect\\(\\(\\) => \\{.*removeEventListener" useRegexp:true
${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"(?s)try \\{.*await" useRegexp:true --args '{"language": ["TypeScript"]}'

Tips

Search for actual code that appears in files, not keywords or questions
- Good: useState(, import React from, async function
- Bad: react tutorial, best practices, how to use
Use (?s) prefix in regex to match across multiple lines
Filter by language to narrow results to relevant file types
Filter by repo with org prefix (e.g. vercel/) to search within an organization
Combine matchCase:true with specific function names for precise matches

---name: grep-appdescription: Search real-world code examples from over a million public GitHub repositories via grep.app MCP. TRIGGER when need to find code usage patterns, see how developers use a library/API in practice, find production examples of a specific function or syntax, or search GitHub code at scale.---# grep.appSearch real-world code examples from over a million public GitHub repositories. Powered by [grep.app](https://grep.app) MCP. No API key required.## searchGitHubFind real-world code examples by searching for **literal code patterns** (like grep), not keywords.- `query` (required): literal code pattern (e.g. `useState(`, `import React from`, `async function`)- `language`: array of language filters (e.g. `Python`, `TypeScript`, `TSX`, `Java`, `Go`, `Rust`, `C#`, `YAML`, `Markdown`)- `repo`: filter by repository (e.g. `facebook/react`, `vercel/`) — partial names match- `path`: filter by file path (e.g. `src/components/Button.tsx`, `/route.ts`) — partial paths match- `useRegexp`: interpret query as regex (default: `false`). Prefix with `(?s)` for multiline- `matchCase`: case-sensitive search (default: `false`)- `matchWholeWords`: match whole words only (default: `false`)### Basic usage```bash${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"useState("${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"getServerSession" --args '{"language": ["TypeScript", "TSX"]}'${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"CORS(" matchCase:true --args '{"language": ["Python"]}'```### Filter by repo or path```bash${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"createContext" repo:"facebook/react"${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"export default" path:"/route.ts" --args '{"language": ["TypeScript"]}'```### Regex patterns```bash${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"(?s)useEffect\$\\(\$ => \\{.*removeEventListener" useRegexp:true${CLAUDE_PLUGIN_ROOT}/scripts/mcpcall.py searchGitHub query:"(?s)try \\{.*await" useRegexp:true --args '{"language": ["TypeScript"]}'```## Tips- Search for **actual code** that appears in files, not keywords or questions - Good: `useState(`, `import React from`, `async function` - Bad: `react tutorial`, `best practices`, `how to use`- Use `(?s)` prefix in regex to match across multiple lines- Filter by `language` to narrow results to relevant file types- Filter by `repo` with org prefix (e.g. `vercel/`) to search within an organization- Combine `matchCase:true` with specific function names for precise matches

Frequently asked questions